CancelMessage{ }
CancelMessage{ }
writeImpl{
  io.netty.buffer.ChannelBuffer.writeInt
  io.netty.buffer.ChannelBuffer.writeInt
  io.netty.buffer.ChannelBuffer.writeInt
}
readImpl{
  io.netty.buffer.ChannelBuffer.readInt
  io.netty.buffer.ChannelBuffer.readInt
  io.netty.buffer.ChannelBuffer.readInt
}
toString{ }
